• The Telegraph---History of the Electromagnetic Telegraph; Telegraph and Telecommunications Lore
• Egypt, Greece and Rome---Latin and Greek Lessons, Geometry and Egyptian Notes
• Railways---Railway History and Engineering, Especially Signalling and Operation
• American History---Historical Notes of All Kinds; William Henry Harrison; Heraldry
• Physics---Physics and Chemistry; Electromagnetism; Quantum Mechanics; Group Theory; The Hodograph
• Mathematical Physics---Physics Through Mathematics, from Analytical Mechanics to Relativity
• Engineering and Technology---Historical and Tutorial Articles in Civil, Mechanical and Electrical Engineering
• Optics and Visual Perception---Physiological and Physical Optics; Optical Illusions
• Waves, Acoustics and Vibration---The World of Waves; The Severn Bore; The Guns of Barisal
• Geology and Scenery---Llano Estacado; Chesil Beach; Volcanoes; Geysers; Will-o'-th'-Wisp
• Meteorology and Weather---Weather Maps, Dynamics and Thermodynamics, Winds and Clouds
• Oil, Economics and Statistics---Energy, Petroleum and Statistics; Clathrates; Corn-Hog Ratio
• Astronomy and Observation---Astronomy, Monthly Guides, Meteorological Optics, Using Compasses and Clinometers
• Humor and Oddities---Words, The Master of Paddington, Joliet, etc.
• Miscellaneous---How to Contact Me, Internet Links, Opinions, Web Authoring, Recipes and Editorials.